4,875 research outputs found

    Dynamics of hadron strong production and decay

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    We generalize results of lattice QCD to determine the spin-dependent symmetries and factorization properties of meson production in OZI allowed processes. This explains some conjectures previously made in the literature about axial meson decays and gives predictions for exclusive decays of vector charmonia, including ways of establishing the structure of Y(4260) and Y(4325) from their S-wave decays. Factorization gives a selection rule which forbids e+e−→D∗D2e^+e^- \to D^* D_2 near threshold with the tensor meson in helicity 2. The relations among amplitudes for double charmonia production \e^+e^-\to \psi\chi_{0,1,2} are expected to differ from the analagous relations among light flavour production such as \e^+e^-\to \omega f_{0,1,2}.Comment: 13 pages; journal versio

    Pencil-Beam Surveys for Faint Trans-Neptunian Objects

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    We have conducted pencil-beam searches for outer solar system objects to a limiting magnitude of R ~ 26. Five new trans-neptunian objects were detected in these searches. Our combined data set provides an estimate of ~90 trans-neptunian objects per square degree brighter than ~ 25.9. This estimate is a factor of 3 above the expected number of objects based on an extrapolation of previous surveys with brighter limits, and appears consistent with the hypothesis of a single power-law luminosity function for the entire trans-neptunian region. Maximum likelihood fits to all self-consistent published surveys with published efficiency functions predicts a cumulative sky density Sigma(<R) obeying log10(Sigma) = 0.76(R-23.4) objects per square degree brighter than a given magnitude R.Comment: Accepted by AJ, 18 pages, including 6 figure

    Is Islam Pro- or Anti-Environmental? Interpretations and Implications

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    Religion has, throughout the centuries, been a powerful institution on the macro level, yet also stands as a force having significant influence in people’s personal lives. This does, however, lead to questions of how a traditional institution such as religion may or may not be adequate to address problems of the Late Industrial Era, most notably the environmental crisis. In this paper, we inquire how various dimensions of Islamic literature and thought can contribute to preserving the natural environment. We find that concepts such as “dominion of men over the earth” and “specialness of humankind” can lead to anti-environmental interpretations of Islam. Nevertheless, other interpretations of Islamic teachings emerge that are compatible with environmental stewardship. However, a number of Islamic governments have shown a decided bias against environmental stewardship, particularly in cases where there is an authoritarian government and one placing an emphasis on economic “development”. In counterpoint, Islamic Mysticism, or Sufism, can provide a spiritual context for environmentally conscious action

    Elective Affinities in the Anthropocene: Christianity and the Natural Environment Reconsidered

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    To reach a deeper understanding of the complex relationship between religion and the natural environment, it is important to move beyond essentializing any religious tradition as having a pro-environmental or anti-environmental ethic. Rather, prior work has shown that the canonical, scholarly, and popular literatures and discourse of a number of religious traditions can and have been socially and rhetorically constructed as supporting an array of positions, from preservation to profligacy, and much in between those two ideal types. In this paper, we develop Max Weber’s theory of “elective affinities” and adapt it to the Anthropocene, to make the case that in a fragmented society, people and communities of convenience tend to choose the tropes and framing from the dominant culture to justify self-interested action. That often can take the form of religious discourse. In the sense of finding a wide array of practical interpretations relative to the environment, the theory is largely supported, although we do find important nuances. It is instructive to look at how the language and legitimacy of one institution (e.g. religion) has been used to justify and legitimate that of others (e.g. the polity). While these processes of institutional co-optation can be effective in the short run, they may have corrosive longer-term effects. Key rhetorical, and in fact political, battles in the Third Millennium, will likely be organized around how to adapt pre-industrial religion to late industrial and perhaps post-industrial times, and it remains to see how central the natural environment will be in what communities hold sacred

    Investigation of methods to produce a uniform cloud of fuel particles in a flame tube

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    The combustion of a uniform, quiescent cloud of 30-micron fuel particles in a flame tube was proposed as a space-based, low-gravity experiment. The subject is the normal- and low-gravity testing of several methods to produce such a cloud, including telescoping propeller fans, air pumps, axial and quadrature acoustical speakers, and combinations of these devices. When operated in steady state, none of the methods produced an acceptably uniform cloud (+ or - 5 percent of the mean concentration), and voids in the cloud were clearly visible. In some cases, severe particle agglomeration was observed; however, these clusters could be broken apart by a short acoustic burst from an axially in-line speaker. Analyses and experiments reported elsewhere suggest that transient, acoustic mixing methods can enhance cloud uniformity while minimizing particle agglomeration

    1993 Accounting Hall of Fame induction : Richard T. Baker Accounting Hall of Fame membership [1993]

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    1993 Accounting Hall of Fame Induction: Richard T. Baker with introduction by Ray J. Groves (Chairman, Ernst & Young); Induction citation by Thomas J. Burns (Deloitte and Touche Professor, The Ohio State University); Response by Richard T. Baker (Chairman Emeritus, Ernst & Whinney

    Promoting Faculty Development with ASEE/NASA Fellowship Programs- Parametric Study of Laser Beam Cutting (LBC) processes- A Case Study

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    American Society for Engineering Education (ASEE) and National Aeronautics and Space Administration (NASA) offer a joint program for faculty and research development. This program known as ASEE/NASA Faculty Fellowship program offers opportunities for professional development for Engineering Technology faculty. This paper discusses one such experience involving applied research at NASA Langley Research Center, which resulted in professional development of the faculty member while enhancing the undergraduate curriculum in Engineering Technology
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